Fire control system and fire control method of liquid cooling energy storage cabinet

Abstract

The invention discloses a fire-fighting control system of a liquid cooling energy storage cabinet. The fire-fighting control system comprises a detection device and a control device, wherein the detection device comprises a first air pressure sensor which is mounted in each battery pack and is used for carrying out real-time air pressure detection on the independent battery pack; the first-stage fire-fighting device comprises a pressure release valve mounted on each battery pack; the second-stage fire-fighting device comprises a pressure release valve mounted on each battery pack; the second-stage fire-fighting device comprises puncture valves mounted on the battery packs, the puncture valves are communicated through fire-fighting pipelines, and the fire-fighting pipelines are communicated with the liquid cooling pipeline; the third-stage fire fighting device comprises a fire fighting valve mounted at the top in the cabinet body of the liquid cooling energy storage cabinet, and the fire fighting valve is communicated with the liquid cooling pipeline; the fourth-stage fire fighting device comprises a liquid cooling unit arranged at the bottom in the cabinet body of the liquid cooling energy storage cabinet; the control device is connected with the detection device and the four-stage fire-fighting device and controls the four-stage fire-fighting device to execute fire-fighting operation according to information collected and sent by the detection device.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage battery cabinets, and in particular to a fire control system and a fire control method for a liquid-cooled energy storage cabinet. Background Art

[0002] The status of energy storage system in the power system is becoming increasingly prominent. With the continuous expansion of battery energy storage scale, the safety of battery packs has become a focus of attention.

[0003] Existing energy storage boxes are usually assembled from multiple battery cells into a battery box, and then the multiple battery boxes are placed in the energy storage box. When the battery cells in the energy storage box thermally run away and catch fire, if firefighting cannot be carried out in time, it will trigger thermal runaway of other lithium battery cells in the energy storage box, thereby causing a major safety accident and affecting personal safety and property safety. Summary of the invention

[0004] The object of the present invention is to provide a fire control system and a fire control method for a liquid-cooled energy storage cabinet, which can effectively solve the above-mentioned technical problems existing in the prior art.

[0005] In order to achieve the above object, an embodiment of the present invention provides a fire control system for a liquid-cooled energy storage cabinet, wherein a plurality of mutually isolated energy storage clusters are arranged in the liquid-cooled energy storage cabinet, each of the energy storage clusters having a plurality of mutually isolated battery packs, and the fire control system comprises:

[0006] A detection device, the detection device comprising a first air pressure sensor installed in each of the battery packs for real-time air pressure detection of the independent battery packs;

[0007] Four-level fire-fighting device, the four-level fire-fighting device includes a first-level fire-fighting device, a second-level fire-fighting device, a third-level fire-fighting device and a fourth-level fire-fighting device; the first-level fire-fighting device includes a pressure relief valve installed on each of the battery packs; the second-level fire-fighting device includes a puncture valve installed on each of the battery packs, each of the puncture valves is connected through a fire-fighting pipeline, and the fire-fighting pipeline is connected to the liquid cooling pipeline; the third-level fire-fighting device includes a fire-fighting valve installed on the top of the cabinet of the liquid-cooled energy storage cabinet, and the fire-fighting valve is connected to the liquid cooling pipeline; the fourth-level fire-fighting device includes a liquid cooling unit arranged at the bottom of the cabinet of the liquid-cooled energy storage cabinet;

[0008] A control device, wherein the control device is connected to the detection device and the fourth-level fire-fighting device respectively, and controls the fourth-level fire-fighting device to perform the following fire-fighting operations according to the information collected and sent by the detection device:

[0009] When any of the first air pressure sensors detects that the air pressure in the corresponding battery pack is greater than or equal to the first air pressure threshold, the first-level fire-fighting device is activated to control the pressure relief valve on the corresponding battery pack to release pressure, and at the same time, the real-time temperature information of the corresponding battery pack is obtained from the battery temperature signal collected from the BMS system according to the ID number of the battery pack whose air pressure is greater than or equal to the first air pressure threshold;

[0010] When the real-time temperature information is greater than or equal to the first temperature threshold, the second-level fire-fighting device is activated to spray the battery pack at a fixed point through the puncture valve on the corresponding battery pack to achieve fire fighting;

[0011] When the proportion of battery packs whose real-time temperature information is greater than or equal to the first temperature threshold is greater than or equal to the first proportion threshold, the third-level fire-fighting device is activated to spray the entire cabinet cavity through the fire-fighting valve installed on the top of the cabinet body of the liquid-cooled energy storage cabinet;

[0012] When the fire valve is activated to spray the entire cabinet cavity, the temperature time series data consisting of the temperatures collected at equal time intervals for each battery pack whose real-time temperature information is greater than or equal to the first temperature threshold is input into a pre-trained temperature prediction model to calculate the estimated time required for the temperature of the corresponding battery pack to drop to the ideal temperature threshold. When the estimated time is greater than or equal to the first time threshold, the fourth-level fire-fighting device is activated to turn on the liquid cooling unit to take away the heat from the bottom of the entire cabinet.

[0013] As an improvement of the above solution, the fire fighting operation further includes:

[0014] When the real-time temperature information is greater than or equal to a second temperature threshold, the entire cabinet cavity is sprayed through a fire valve installed on the top of the cabinet body of the liquid-cooled energy storage cabinet; the second temperature threshold is greater than the first temperature threshold;

[0015] When the fire valve is activated to spray the entire cabinet cavity, the temperature time series data consisting of the temperatures collected at equal time intervals for each battery pack whose real-time temperature information is greater than or equal to the second temperature threshold is input into a pre-trained temperature prediction model to calculate the estimated time required for the temperature of the corresponding battery pack to drop to the ideal temperature threshold. When the estimated time is greater than or equal to the second time threshold, the fourth-level fire-fighting device is activated to turn on the liquid cooling unit to take away the heat from the bottom of the entire cabinet.

[0016] As an improvement of the above solution, the fire fighting operation further includes:

[0017] When the proportion of battery packs whose real-time temperature information is greater than or equal to the first temperature threshold is greater than or equal to the second proportion threshold, the third-level fire-fighting device is activated to spray the entire cabinet cavity through the fire-fighting valve installed on the top of the cabinet body of the liquid-cooled energy storage cabinet, and at the same time, the fourth-level fire-fighting device is activated to turn on the liquid cooling unit to take away the heat from the bottom of the entire cabinet body; the second proportion threshold is greater than the first proportion threshold.

[0018] As an improvement of the above solution, the first quantity proportion threshold is 30%; the second quantity proportion threshold is 50%.

[0019] As an improvement of the above solution, the top of the cabinet shell of the liquid-cooled energy storage cabinet is a double-layer structure, and the inner layer of the double-layer structure is provided with an explosion-proof cover; the detection device also includes a second air pressure sensor arranged in the cabinet of the liquid-cooled energy storage cabinet; the fire-fighting operation also includes:

[0020] When the second air pressure sensor detects in real time that the air pressure inside the cabinet of the liquid-cooled energy storage cabinet is greater than or equal to a second air pressure threshold, the explosion-proof cover is opened to evacuate the gas inside the cabinet.

[0021] As an improvement of the above solution, heat dissipation holes are provided around the outer shell of the cabinet body of the liquid-cooled energy storage cabinet, so as to reduce the influence of external heat radiation on the temperature inside the cabinet body.

[0022] Another embodiment of the present invention provides a fire control method for a liquid-cooled energy storage cabinet, wherein a plurality of mutually isolated energy storage clusters are arranged in the liquid-cooled energy storage cabinet, each of the energy storage clusters having a plurality of mutually isolated battery packs, a detection device and a four-level fire-fighting device in the liquid-cooled energy storage cabinet, wherein the detection device comprises a first air pressure sensor installed in each of the battery packs for real-time air pressure detection of the independent battery packs; the four-level fire-fighting device comprises a first-level fire-fighting device, a second-level fire-fighting device, a third-level fire-fighting device and a fourth-level fire-fighting device; the first-level fire-fighting device comprises a pressure relief valve installed on each of the battery packs; the second-level fire-fighting device comprises a puncture valve installed on each of the battery packs, each of the puncture valves is connected through a fire-fighting pipeline, and the fire-fighting pipeline is connected to a liquid cooling pipeline; the third-level fire-fighting device comprises a fire-fighting valve installed on the top of the cabinet body of the liquid-cooled energy storage cabinet, and the fire-fighting valve is connected to the liquid cooling pipeline; the fourth-level fire-fighting device comprises a liquid cooling unit arranged at the bottom of the cabinet body of the liquid-cooled energy storage cabinet; the fire-fighting control method comprises:

[0023] When any of the first air pressure sensors detects that the air pressure in the corresponding battery pack is greater than or equal to the first air pressure threshold, the first-level fire-fighting device is activated to control the pressure relief valve on the corresponding battery pack to release pressure, and at the same time, the real-time temperature information of the corresponding battery pack is obtained from the battery temperature signal collected from the BMS system according to the ID number of the battery pack whose air pressure is greater than or equal to the first air pressure threshold;

[0024] When the real-time temperature information is greater than or equal to the first temperature threshold, the second-level fire-fighting device is activated to spray the battery pack at a fixed point through the puncture valve on the corresponding battery pack to achieve fire fighting;

[0025] When the proportion of battery packs whose real-time temperature information is greater than or equal to the first temperature threshold is greater than or equal to the first proportion threshold, the third-level fire-fighting device is activated to spray the entire cabinet cavity through the fire-fighting valve installed on the top of the cabinet body of the liquid-cooled energy storage cabinet;

[0026] When the fire valve is activated to spray the entire cabinet cavity, the temperature time series data consisting of the temperatures collected at equal time intervals for each battery pack whose real-time temperature information is greater than or equal to the first temperature threshold is input into a pre-trained temperature prediction model to calculate the estimated time required for the temperature of the corresponding battery pack to drop to the ideal temperature threshold. When the estimated time is greater than or equal to the first time threshold, the fourth-level fire-fighting device is activated to turn on the liquid cooling unit to take away the heat from the bottom of the entire cabinet.

[0027] As an improvement of the above solution, the fire control method further includes:

[0028] When the real-time temperature information is greater than or equal to a second temperature threshold, the entire cabinet cavity is sprayed through a fire valve installed on the top of the cabinet body of the liquid-cooled energy storage cabinet; the second temperature threshold is greater than the first temperature threshold;

[0029] When the fire valve is activated to spray the entire cabinet cavity, the temperature time series data consisting of the temperatures collected at equal time intervals for each battery pack whose real-time temperature information is greater than or equal to the second temperature threshold is input into a pre-trained temperature prediction model to calculate the estimated time required for the temperature of the corresponding battery pack to drop to the ideal temperature threshold. When the estimated time is greater than or equal to the second time threshold, the fourth-level fire-fighting device is activated to turn on the liquid cooling unit to take away the heat from the bottom of the entire cabinet.

[0030] As an improvement of the above solution, the fire control method further includes:

[0031] When the proportion of battery packs whose real-time temperature information is greater than or equal to the first temperature threshold is greater than or equal to the second proportion threshold, the third-level fire-fighting device is activated to spray the entire cabinet cavity through the fire-fighting valve installed on the top of the cabinet body of the liquid-cooled energy storage cabinet, and at the same time, the fourth-level fire-fighting device is activated to turn on the liquid cooling unit to take away the heat from the bottom of the entire cabinet body; the second proportion threshold is greater than the first proportion threshold.

[0032] As an improvement of the above solution, the first quantity proportion threshold is 30%; the second quantity proportion threshold is 50%.

[0033] Compared with the prior art, the fire control system and fire control method of a liquid-cooled energy storage cabinet provided in the embodiment of the present invention are provided by arranging four-level fire-fighting devices in the liquid-cooled energy storage cabinet, and the four-level fire-fighting devices include a first-level fire-fighting device, a second-level fire-fighting device, a third-level fire-fighting device and a fourth-level fire-fighting device; the first-level fire-fighting device includes a pressure relief valve installed on each of the battery packs; the second-level fire-fighting device includes a puncture valve installed on each of the battery packs, each of the puncture valves is connected through a fire-fighting pipeline, and the fire-fighting pipeline is connected to the liquid cooling pipeline; the third-level fire-fighting device includes a fire-fighting valve installed on the top of the cabinet of the liquid-cooled energy storage cabinet, and the fire-fighting valve is connected to the liquid cooling pipeline; the fourth-level fire-fighting device includes a liquid cooling unit provided at the bottom of the cabinet of the liquid-cooled energy storage cabinet; when any of the first air pressure sensors collects that the air pressure in the corresponding battery pack is greater than or equal to the first air pressure threshold, the first-level fire-fighting device is started to control the pressure relief valve on the corresponding battery pack to release the pressure, and at the same time, the ID number of the battery pack whose air pressure is greater than or equal to the first air pressure threshold is collected from the BMS system. The real-time temperature information of the corresponding battery pack is obtained from the battery temperature signal; when the real-time temperature information is greater than or equal to the first temperature threshold, the second-level fire-fighting device is started to spray the battery pack at a fixed point through the puncture valve on the corresponding battery pack to achieve fire fighting; when the proportion of the number of battery packs whose real-time temperature information is greater than or equal to the first temperature threshold is greater than or equal to the first number proportion threshold, the third-level fire-fighting device is started to spray the entire cabinet cavity through the fire-fighting valve installed on the top of the cabinet of the liquid-cooled energy storage cabinet; when the fire-fighting valve is started to spray the entire cabinet cavity, the temperature time series data composed of the temperatures collected at equal time intervals for each battery pack whose real-time temperature information is greater than or equal to the first temperature threshold is input into a pre-trained temperature prediction model, so as to calculate the estimated time required for the temperature of the corresponding battery pack to drop to the ideal temperature threshold; when the estimated time is greater than or equal to the first time threshold, the fourth-level fire-fighting device is started to turn on the liquid cooling unit to take away the heat from the bottom of the entire cabinet, so as to achieve the fire fighting operation of thermal runaway of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a structural block diagram of a fire control system of a liquid-cooled energy storage cabinet provided in an embodiment of the present invention.

[0036] Figure 2 It is a structural schematic diagram of a liquid-cooled energy storage cabinet provided in an embodiment of the present invention.

[0037] Figure 3 It is a structural schematic diagram of a liquid-cooled energy storage cabinet from another angle provided by an embodiment of the present invention.

[0038] Figure 4 It is a structural schematic diagram of a liquid-cooled energy storage cabinet provided by an embodiment of the present invention from another angle.

[0039] Figure 5 It is a structural schematic diagram of a liquid-cooled energy storage cabinet provided by an embodiment of the present invention from another angle.

[0040] Figure 6 It is a flow chart of a fire control method for a liquid-cooled energy storage cabinet provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] refer to Figure 1 An embodiment of the present invention provides a fire control system 100 for a liquid-cooled energy storage cabinet, which is used to perform fire operations for thermal runaway of battery cells in the liquid-cooled energy storage cabinet.

[0046] Specifically, refer to Figure 2-3 The liquid-cooled energy storage cabinet 200 is provided with a plurality of mutually isolated energy storage clusters, and each of the energy storage clusters has a plurality of mutually isolated battery packs 201.

[0047] Combined with reference Figure 1 to Figure 3 In this embodiment, the fire control system 100 includes a detection device 101, a four-level fire device 102 and a control device 103, wherein:

[0048] The detection device 101 includes a first air pressure sensor 2021 installed in each battery pack 201 for performing real-time air pressure detection on the independent battery pack 201 .

[0049] The four-level fire-fighting device 102 includes a first-level fire-fighting device 1021 , a second-level fire-fighting device 1022 , a third-level fire-fighting device 1023 and a fourth-level fire-fighting device 1024 .

[0050] The first-level fire-fighting device 1021 includes a pressure relief valve (not shown) installed on each of the battery packs 201 , and each of the pressure relief valves (not shown) is used to relieve pressure on the battery pack 201 .

[0051] The second-level fire-fighting device 1022 includes a puncture valve 204 installed on each of the battery packs 201 , each of the puncture valves 204 is connected via a fire-fighting pipeline 205 , and the fire-fighting pipeline 205 is connected to a liquid cooling pipeline 206 .

[0052] The third-level fire-fighting device 1023 includes a fire-fighting valve 207 installed on the top of the cabinet body of the liquid-cooled energy storage cabinet 200 , and the fire-fighting valve 207 is connected to the liquid-cooling pipeline 206 .

[0053] The fourth-level fire-fighting device 1024 includes a liquid cooling unit 208 disposed at the bottom of the cabinet of the liquid-cooled energy storage cabinet 200. The liquid cooling unit 208 is disposed at the bottom of the entire battery cell.

[0054] The control device 103 is connected to the detection device 101 and the fourth-level fire fighting device 102 respectively, and controls the fourth-level fire fighting device 102 to perform the following fire fighting operations according to the information collected and sent by the detection device 101:

[0055] When any of the first air pressure sensors 202 detects that the air pressure in the corresponding battery pack 201 is greater than or equal to the first air pressure threshold value P1, the first-level fire-fighting device 1021 is activated to control the pressure relief valve (not shown) on the corresponding battery pack 201 to release the pressure, and at the same time, the real-time temperature information of the corresponding battery pack 201 is obtained from the battery temperature signal collected in the BMS system according to the ID number of the battery pack 201 whose air pressure is greater than or equal to the first air pressure threshold value. In this embodiment of the present invention, each battery pack 201 is provided with an ID number for unique identification. The BMS (Battery Management Ssystem, battery management system) system, also known as a battery nanny or battery butler, monitors the battery status by collecting battery voltage signals, battery temperature signals, battery fault signals, etc. of the energy storage battery to prevent the battery from overcharging and over-discharging. In this embodiment, the real-time temperature information of the corresponding battery pack 201 is obtained from the battery temperature signal collected in the BMS system for fire assessment, rather than obtaining the real-time temperature information of the battery pack 201 through a separately set temperature sensor, thereby reducing a large number of sensor devices inside the battery and effectively reducing detection costs.

[0056] When the real-time temperature information is greater than or equal to the first temperature threshold T1, the second-level fire-fighting device 1022 is activated to perform targeted spraying on the battery pack 201 through the puncture valve 204 on the corresponding battery pack 201 to achieve fire-fighting.

[0057] When the proportion of battery packs 201 whose real-time temperature information is greater than or equal to the first temperature threshold T1 is greater than or equal to the first quantity proportion threshold Q1, the third-level fire-fighting device 1023 is activated to spray the entire cabinet cavity through the fire-fighting valve 207 installed on the top of the cabinet body of the liquid-cooled energy storage cabinet 200.

[0058] When the fire valve 207 is activated to spray the entire cabinet cavity, the temperature time series data consisting of the temperature collected at equal time intervals for each battery pack 201 whose real-time temperature information is greater than or equal to the first temperature threshold T1 is input into a pre-trained temperature prediction model, so as to calculate the estimated time required for the temperature of the corresponding battery pack 201 to drop to the ideal temperature threshold. When the estimated time is greater than or equal to the first time threshold t1, the fourth-level fire protection device 1024 is activated to turn on the liquid cooling unit 208 to take away the heat from the bottom of the entire cabinet. It can be understood that in this embodiment, the temperature prediction model can be trained multiple times by collecting relevant training data to improve the accuracy of the predicted results of the temperature prediction model. In addition, the training process of the temperature prediction model can adopt a training algorithm familiar in the art, which is not specifically limited here.

[0059] Furthermore, in another preferred embodiment, the control device 103 controls the firefighting operation performed by the fourth-level firefighting device 102 according to the information collected and sent by the detection device 101, and further includes:

[0060] When the real-time temperature information is greater than or equal to a second temperature threshold value T2, the entire cabinet cavity is sprayed through a fire valve 207 installed at the top of the cabinet body of the liquid-cooled energy storage cabinet 200; the second temperature threshold value T2 is greater than the first temperature threshold value T1;

[0061] When the fire valve 207 is activated to spray the entire cabinet cavity, the temperature time series data consisting of the temperature collected at equal time intervals for each battery pack 201 whose real-time temperature information is greater than or equal to the second temperature threshold T2 is input into the pre-trained temperature prediction model, so as to calculate the estimated time required for the temperature of the corresponding battery pack 201 to drop to the ideal temperature threshold. When the estimated time is greater than or equal to the second time threshold t2, the fourth-level fire device 1024 is activated to turn on the liquid cooling unit 208 to take away the heat from the bottom of the entire cabinet. The second time threshold t2 can be equal to the first time threshold t1.

[0062] Furthermore, in another preferred embodiment, the control device 103 controls the firefighting operation performed by the fourth-level firefighting device 102 according to the information collected and sent by the detection device 101, and further includes:

[0063] When the proportion of the number of battery packs 201 whose real-time temperature information is greater than or equal to the first temperature threshold T1 is greater than or equal to the second proportion threshold Q2, the third-level fire-fighting device 1023 is activated to spray the entire cabinet cavity through the fire-fighting valve 207 installed on the top of the cabinet body of the liquid-cooled energy storage cabinet 200, and the fourth-level fire-fighting device 1024 is activated to open the liquid cooling unit 208 to take away the heat from the bottom of the entire cabinet body; wherein the second proportion threshold Q2 is greater than the first proportion threshold Q1. For example, the first proportion threshold Q1 is 30%; the second proportion threshold Q2 is 50%.

[0064] Combined with reference Figure 1 to Figure 4 In a preferred embodiment, the top 2001 of the cabinet shell of the liquid-cooled energy storage cabinet 200 is a double-layer structure, and the inner layer of the double-layer structure is provided with an explosion-proof cover 2002. The detection device 101 also includes a second air pressure sensor 2022 provided in the cabinet of the liquid-cooled energy storage cabinet 200. The control device 103 controls the firefighting operation performed by the fourth-level firefighting device 102 according to the information collected and sent by the detection device 101, and further includes:

[0065] When the second air pressure sensor 2022 collects in real time that the air pressure inside the cabinet of the liquid-cooled energy storage cabinet 200 is greater than or equal to the second air pressure threshold value P2, the explosion-proof cover 2002 is opened to evacuate the gas inside the cabinet.

[0066] In addition, refer to Figure 5 The outer shell of the liquid-cooled energy storage cabinet 200 is provided with heat dissipation holes 2009 around the cabinet body, thereby reducing the influence of external heat radiation on the temperature inside the cabinet body.

[0067] refer to Figure 6, an embodiment of the present invention discloses a fire control method for a liquid-cooled energy storage cabinet, wherein a plurality of mutually isolated energy storage clusters are arranged in the liquid-cooled energy storage cabinet, each of the energy storage clusters has a plurality of mutually isolated battery packs, a detection device and a four-level fire-fighting device are arranged in the liquid-cooled energy storage cabinet, the detection device comprises a first air pressure sensor installed in each of the battery packs for real-time air pressure detection of the independent battery packs; the four-level fire-fighting device comprises a first-level fire-fighting device, a second-level fire-fighting device, a third-level fire-fighting device and a fourth-level fire-fighting device; the first-level fire-fighting device comprises a pressure relief valve installed on each of the battery packs; the second-level fire-fighting device comprises a puncture valve installed on each of the battery packs, each of the puncture valves is connected through a fire-fighting pipeline, and the fire-fighting pipeline is connected to a liquid cooling pipeline; the third-level fire-fighting device comprises a fire-fighting valve installed on the top of the cabinet body of the liquid-cooled energy storage cabinet, and the fire-fighting valve is connected to the liquid cooling pipeline; the fourth-level fire-fighting device comprises a liquid cooling unit arranged at the bottom of the cabinet body of the liquid-cooled energy storage cabinet; the fire-fighting control method comprises the steps of:

[0068] S1. When any of the first air pressure sensors detects that the air pressure in the corresponding battery pack is greater than or equal to the first air pressure threshold, the first-level fire-fighting device is activated to control the pressure relief valve on the corresponding battery pack to release pressure, and at the same time, the real-time temperature information of the corresponding battery pack is obtained from the battery temperature signal collected from the BMS system according to the ID number of the battery pack whose air pressure is greater than or equal to the first air pressure threshold;

[0069] S2. When the real-time temperature information is greater than or equal to the first temperature threshold, the second-level fire-fighting device is activated to spray the battery pack at a fixed point through the puncture valve on the corresponding battery pack to achieve fire-fighting;

[0070] S3. When the proportion of battery packs whose real-time temperature information is greater than or equal to the first temperature threshold is greater than or equal to the first proportion threshold, the third-level fire-fighting device is activated to spray the entire cabinet cavity through the fire-fighting valve installed on the top of the cabinet body of the liquid-cooled energy storage cabinet;

[0071] S4. When the fire valve is activated to spray the entire cabinet cavity, the temperature time series data consisting of the temperatures collected at equal time intervals for each battery pack whose real-time temperature information is greater than or equal to the first temperature threshold is input into a pre-trained temperature prediction model to calculate the estimated time required for the temperature of the corresponding battery pack to drop to the ideal temperature threshold. When the estimated time is greater than or equal to the first time threshold, the fourth-level fire protection device is activated to turn on the liquid cooling unit to take away the heat from the bottom of the entire cabinet.

[0072] Furthermore, in another preferred embodiment, the fire control method further includes:

[0073] When the real-time temperature information is greater than or equal to a second temperature threshold, the entire cabinet cavity is sprayed through a fire valve installed on the top of the cabinet body of the liquid-cooled energy storage cabinet; the second temperature threshold is greater than the first temperature threshold;

[0074] When the fire valve is activated to spray the entire cabinet cavity, the temperature time series data consisting of the temperatures collected at equal time intervals for each battery pack whose real-time temperature information is greater than or equal to the second temperature threshold is input into a pre-trained temperature prediction model to calculate the estimated time required for the temperature of the corresponding battery pack to drop to the ideal temperature threshold. When the estimated time is greater than or equal to the second time threshold, the fourth-level fire-fighting device is activated to turn on the liquid cooling unit to take away the heat from the bottom of the entire cabinet.

[0075] Furthermore, in another preferred embodiment, the fire control method further includes:

[0076] When the proportion of battery packs whose real-time temperature information is greater than or equal to the first temperature threshold is greater than or equal to the second proportion threshold, the third-level fire-fighting device is activated to spray the entire cabinet cavity through the fire-fighting valve installed on the top of the cabinet of the liquid-cooled energy storage cabinet, and the fourth-level fire-fighting device is activated to turn on the liquid cooling unit to take away the heat from the bottom of the entire cabinet; the second proportion threshold is greater than the first proportion threshold. For example, the first proportion threshold is 30%; the second proportion threshold is 50%.

[0077] The above disclosures are only some preferred embodiments of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention are still within the scope of the invention.

Claims

1. A fire control system for a liquid-cooled energy storage cabinet, wherein the liquid-cooled energy storage cabinet is provided with a plurality of mutually isolated energy storage clusters, each of the energy storage clusters having a plurality of mutually isolated battery packs, characterized in that: The fire control system comprises: A detection device, the detection device comprising a first air pressure sensor installed in each of the battery packs for real-time air pressure detection of the independent battery packs; Four-level fire-fighting device, the four-level fire-fighting device includes a first-level fire-fighting device, a second-level fire-fighting device, a third-level fire-fighting device and a fourth-level fire-fighting device; the first-level fire-fighting device includes a pressure relief valve installed on each of the battery packs; the second-level fire-fighting device includes a puncture valve installed on each of the battery packs, each of the puncture valves is connected through a fire-fighting pipeline, and the fire-fighting pipeline is connected to the liquid cooling pipeline; the third-level fire-fighting device includes a fire-fighting valve installed on the top of the cabinet of the liquid-cooled energy storage cabinet, and the fire-fighting valve is connected to the liquid cooling pipeline; the fourth-level fire-fighting device includes a liquid cooling unit arranged at the bottom of the cabinet of the liquid-cooled energy storage cabinet; A control device, wherein the control device is connected to the detection device and the fourth-level fire-fighting device respectively, and controls the fourth-level fire-fighting device to perform the following fire-fighting operations according to the information collected and sent by the detection device: When any of the first air pressure sensors detects that the air pressure in the corresponding battery pack is greater than or equal to the first air pressure threshold, the first-level fire-fighting device is activated to control the pressure relief valve on the corresponding battery pack to release pressure, and at the same time, the real-time temperature information of the corresponding battery pack is obtained from the battery temperature signal collected from the BMS system according to the ID number of the battery pack whose air pressure is greater than or equal to the first air pressure threshold; When the real-time temperature information is greater than or equal to the first temperature threshold, the second-level fire-fighting device is activated to spray the battery pack at a fixed point through the puncture valve on the corresponding battery pack to achieve fire fighting; When the proportion of battery packs whose real-time temperature information is greater than or equal to the first temperature threshold is greater than or equal to the first proportion threshold, the third-level fire-fighting device is activated to spray the entire cabinet cavity through the fire-fighting valve installed on the top of the cabinet body of the liquid-cooled energy storage cabinet; When the fire valve is activated to spray the entire cabinet cavity, the temperature time series data consisting of the temperatures collected at equal time intervals for each battery pack whose real-time temperature information is greater than or equal to the first temperature threshold is input into a pre-trained temperature prediction model to calculate the estimated time required for the temperature of the corresponding battery pack to drop to the ideal temperature threshold. When the estimated time is greater than or equal to the first time threshold, the fourth-level fire-fighting device is activated to turn on the liquid cooling unit to take away the heat from the bottom of the entire cabinet.

2. The fire control system of the liquid-cooled energy storage cabinet according to claim 1 is characterized in that: The firefighting operation also includes: When the real-time temperature information is greater than or equal to a second temperature threshold, the entire cabinet cavity is sprayed through a fire valve installed on the top of the cabinet body of the liquid-cooled energy storage cabinet; the second temperature threshold is greater than the first temperature threshold; When the fire valve is activated to spray the entire cabinet cavity, the temperature time series data consisting of the temperatures collected at equal time intervals for each battery pack whose real-time temperature information is greater than or equal to the second temperature threshold is input into a pre-trained temperature prediction model to calculate the estimated time required for the temperature of the corresponding battery pack to drop to the ideal temperature threshold. When the estimated time is greater than or equal to the second time threshold, the fourth-level fire-fighting device is activated to turn on the liquid cooling unit to take away the heat from the bottom of the entire cabinet.

3. The fire control system of the liquid-cooled energy storage cabinet according to claim 1 is characterized in that: The firefighting operation also includes: When the proportion of battery packs whose real-time temperature information is greater than or equal to the first temperature threshold is greater than or equal to the second proportion threshold, the third-level fire-fighting device is activated to spray the entire cabinet cavity through the fire-fighting valve installed on the top of the cabinet body of the liquid-cooled energy storage cabinet, and at the same time, the fourth-level fire-fighting device is activated to turn on the liquid cooling unit to take away the heat from the bottom of the entire cabinet body; the second proportion threshold is greater than the first proportion threshold.

4. The fire control system of the liquid-cooled energy storage cabinet according to claim 3 is characterized in that: The first quantity proportion threshold is 30%; the second quantity proportion threshold is 50%.

5. The fire control system of the liquid-cooled energy storage cabinet according to claim 1, characterized in that: The top of the cabinet shell of the liquid-cooled energy storage cabinet is a double-layer structure, and the inner layer of the double-layer structure is provided with an explosion-proof cover; the detection device also includes a second air pressure sensor arranged in the cabinet of the liquid-cooled energy storage cabinet; the fire-fighting operation also includes: When the second air pressure sensor detects in real time that the air pressure inside the cabinet of the liquid-cooled energy storage cabinet is greater than or equal to a second air pressure threshold, the explosion-proof cover is opened to evacuate the gas inside the cabinet.

6. The fire control system of the liquid-cooled energy storage cabinet according to claim 5, characterized in that: The outer shell of the cabinet of the liquid-cooled energy storage cabinet is provided with heat dissipation holes around the periphery, thereby reducing the influence of external heat radiation on the temperature inside the cabinet.

7. A fire control method for a liquid-cooled energy storage cabinet, characterized in that: The liquid-cooled energy storage cabinet is provided with a plurality of energy storage clusters isolated from each other, each of the energy storage clusters having a plurality of battery packs isolated from each other, a detection device and a four-level fire-fighting device in the liquid-cooled energy storage cabinet, the detection device comprising a first air pressure sensor installed in each of the battery packs for real-time air pressure detection of the independent battery packs; the four-level fire-fighting device comprises a first-level fire-fighting device, a second-level fire-fighting device, a third-level fire-fighting device and a fourth-level fire-fighting device; the first-level fire-fighting device comprises a pressure relief valve installed on each of the battery packs; the second-level fire-fighting device comprises a puncture valve installed on each of the battery packs, each of the puncture valves is connected through a fire-fighting pipeline, and the fire-fighting pipeline is connected to the liquid cooling pipeline; the third-level fire-fighting device comprises a fire-fighting valve installed on the top of the cabinet body of the liquid-cooled energy storage cabinet, and the fire-fighting valve is connected to the liquid cooling pipeline; the fourth-level fire-fighting device comprises a liquid cooling unit arranged at the bottom of the cabinet body of the liquid-cooled energy storage cabinet; The fire control method comprises: When any of the first air pressure sensors detects that the air pressure in the corresponding battery pack is greater than or equal to the first air pressure threshold, the first-level fire-fighting device is activated to control the pressure relief valve on the corresponding battery pack to release pressure, and at the same time, the real-time temperature information of the corresponding battery pack is obtained from the battery temperature signal collected from the BMS system according to the ID number of the battery pack whose air pressure is greater than or equal to the first air pressure threshold; When the real-time temperature information is greater than or equal to the first temperature threshold, the second-level fire-fighting device is activated to spray the battery pack at a fixed point through the puncture valve on the corresponding battery pack to achieve fire fighting; When the proportion of battery packs whose real-time temperature information is greater than or equal to the first temperature threshold is greater than or equal to the first proportion threshold, the third-level fire-fighting device is activated to spray the entire cabinet cavity through the fire-fighting valve installed on the top of the cabinet body of the liquid-cooled energy storage cabinet; When the fire valve is activated to spray the entire cabinet cavity, the temperature time series data consisting of the temperatures collected at equal time intervals for each battery pack whose real-time temperature information is greater than or equal to the first temperature threshold is input into a pre-trained temperature prediction model to calculate the estimated time required for the temperature of the corresponding battery pack to drop to the ideal temperature threshold. When the estimated time is greater than or equal to the first time threshold, the fourth-level fire-fighting device is activated to turn on the liquid cooling unit to take away the heat from the bottom of the entire cabinet.

8. The fire control method of the liquid-cooled energy storage cabinet according to claim 7, characterized in that: The fire control method further comprises: When the real-time temperature information is greater than or equal to a second temperature threshold, the entire cabinet cavity is sprayed through a fire valve installed on the top of the cabinet body of the liquid-cooled energy storage cabinet; the second temperature threshold is greater than the first temperature threshold; When the fire valve is activated to spray the entire cabinet cavity, the temperature time series data consisting of the temperatures collected at equal time intervals for each battery pack whose real-time temperature information is greater than or equal to the second temperature threshold is input into a pre-trained temperature prediction model to calculate the estimated time required for the temperature of the corresponding battery pack to drop to the ideal temperature threshold. When the estimated time is greater than or equal to the second time threshold, the fourth-level fire-fighting device is activated to turn on the liquid cooling unit to take away the heat from the bottom of the entire cabinet.

9. The fire control method of the liquid-cooled energy storage cabinet according to claim 7, characterized in that: The fire control method further comprises: When the proportion of battery packs whose real-time temperature information is greater than or equal to the first temperature threshold is greater than or equal to the second proportion threshold, the third-level fire-fighting device is activated to spray the entire cabinet cavity through the fire-fighting valve installed on the top of the cabinet body of the liquid-cooled energy storage cabinet, and at the same time, the fourth-level fire-fighting device is activated to turn on the liquid cooling unit to take away the heat from the bottom of the entire cabinet body; the second proportion threshold is greater than the first proportion threshold.

10. The fire control method of the liquid-cooled energy storage cabinet according to claim 9, characterized in that: The first quantity proportion threshold is 30%; the second quantity proportion threshold is 50%.

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